Bureaucrats are one level up from administrators but have none of the administrator privileges. Bureaucrats only have the ability to manipulate users rights. They have the ability to promote and revoke rollback, chat moderator and administrator rights as well as appointing new bureaucrats. While they cannot directly revoke another user's bureaucrat status, they can revoke their own. Bureaucrats also have the ability to revoke a user's bot status in case the bot is malfunctioning, but community consensus is required for the addition of users's bot status.
By default, bureaucrats are not identified on their userpages. If a bureaucrat is also an admin, only "ADMIN" will show so Special:ListUsers must be used to tell bureaucrats from normal administrators.